package cn.stylefeng.guns.core.interceptor;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CorsFilter implements Filter {
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
			throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) servletResponse;
		HttpServletRequest request = (HttpServletRequest) servletRequest;

		//String origin = request.getHeader("Origin");
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "content-type,x-requested-with,Authorization");
		response.setHeader("Access-Control-Allow-Credentials", "true");
		String method = request.getMethod();
		if (method.equalsIgnoreCase("OPTIONS")) {
			servletResponse.getOutputStream().write("Success".getBytes("utf-8"));
		} else {
			filterChain.doFilter(servletRequest, servletResponse);
		}
	}

	@Override
	public void destroy() {

	}
}
